Improvement in dust-rooms connected with machines for picking cotfon



UNITE STATES PATENT OFFICE RICHARD KITSON, OF LOWVELL, MASSACHUSETTS.

IMPROVEMENT IN DUST-ROOMS CONNECTED WITH MACHINES FOR PlCKlNG COTTQN,-&c.

Specification forming part of Letters Patent No. 36,219, dated August 19, 1862.

.To all whom it may concern.-

Be it known that I, RICHARD KITSON, of

Lowell, in the county of Middlesex and State of Massachusetts, have invented a new and useful Improvement in Dust- Rooms Connected with Machines for'Picking and Opening Cotton and other Fibrous Materials; and

, I do hereby declare that the following is a full,

pipes which all terminate and discharge into I a dust-room; but there is one diificulty connected with this arrangement which I wish to obviate, which is as follows: Whenever it is necessary to stop one of the machines, the pressure of the air in the dust-room, produced by the fans of the machine, which continue in operation, being greater than the pressure of the atmosphere in the picker-room, forces the I air and dust back through the dust-pipe of the machine that is stopped into the pickerroom.

The object of my invention is to obviate this difficulty; and to this end it consists in fitting the dust-pipes of the pickers with valves which close automatically when their respective machines are stopped.

To enable others skilled in the art to make and use my invention, I will proceed to describe its construction and operation.

A is the dust-room, fitted below its roof with a screen, B, for the retention of any fiber that may be carried into it by the draft in the dustpipes, and having openings a a in the roof for the escape of the dust. V

O O G are three dustpi pesbelonging to three pickers, and D D D are the valves fitted to the mouths of the dust pipes. These valves are of the kind known as flap-valves, and are suspended from pins?) 12 in such manner as to close the mouths of the pipes by gravitation when the pressure of air in the pipes is no greater than that in the dustroom, but to be opened easily by the pressure in the pipes said valves effectually prevent any back-press- I ure in the pipes and the return of dust through them into the picker-room when their respective machines are stopped.

What I claim as my invention, and desire to Y secure by Letters Patent, is

Furnishing the dust-pipes of the pickers or openers-with valves D D D, closing automatically, substantially as herein specified.

I RICHARD KITSON.

Witnesses: HORATIO G. F. Conmss,

FRED. W. HARRIS.

when such pressure is greater than that in the 

